Remove wdm dependency and ensure logger is included in Gemfile.lock

Author: SabotageAndi

Gemfile

@@ -6,5 +6,4 @@ gem "github-pages", group: :jekyll_plugins
 gem "minimal-mistakes-jekyll"
 gem "csv"
 gem "base64"
-gem "logger"
-gem 'wdm', '>= 0.1.0' if Gem.win_platform?
+gem "logger"

Gemfile.lock

@@ -276,7 +276,6 @@ GEM
       concurrent-ruby (~> 1.0)
     unicode-display_width (1.8.0)
     uri (1.0.3)
-    wdm (0.2.0)
     webrick (1.9.1)
 
 PLATFORMS
@@ -289,7 +288,6 @@ DEPENDENCIES
   github-pages
   logger
   minimal-mistakes-jekyll
-  wdm (>= 0.1.0)
 
 BUNDLED WITH
    2.6.9